It was originally reported that the officer shot a burglar, but investigators now believe there was no burglary and that the two men were brothers, according to the Chronicle. They did not immediately offer a motive.

"The exact circumstances surrounding the shooting are under investigation," Spencer said. "We don't believe there was a burglary at the residence."

The shooting occurred in Stagecoach in Montgomery County, about 30 miles northwest of Houston.

Spencer said a Stagecoach Police Department officer came home and found a man inside the house. He then shot the suspect, whom officials identified as the off-duty Harris deputy and the shooter's brother.

Officers responded and found a man dead with multiple gunshot wounds inside of a bathroom at the home, Spencer said.

The Stagecoach officer was not injured.

The Stagecoach officer has 35 years of law enforcement experience, Spencer said. The Harris County deputy is also a longtime officer.

The Montgomery County District Attorney's Office and the Texas Rangers are also investigating, according to the Chronicle.